A Faraday laser operating on Cs 852 nm transition

Chang, Pengyuan; Chen, Yilai; Shang, Haosen; Guan, Xiaolei; Guo, Hong; Luo, Bin

doi:10.1007/s00340-019-7342-5

Cited by 31 publications

(12 citation statements)

References 59 publications

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“…Examples of the former include filtering of frequency-degenerate photon pairs [213]; filtering of Mollow-triplet sidebands [214]; recording atomic spectra with single-molecule light sources [215]; free-space optical communications [216] and quantum key distribution [217]. Examples of the latter include Faraday lasers [64,[218][219][220][221]; Doppler velocimetry [222]; atmospheric LIDAR [223][224][225][226][227][228]; simultaneous atmospheric wind and temperature measurement [229]; and discerning rocket plumes from sunglints [230]. In addition, the same principle of achieving large optical rotation with minimal absorption in the vicinity of an atomic resonance has been used to realise different photonic devices, such as dichroic beam splitters (BSs) [59,231], and compact OIs [58].…”

Section: Narrowband Atomic Line Filtersmentioning

confidence: 99%

Laser spectroscopy of hot atomic vapours: from ’scope to theoretical fit

et al. 2022

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The spectroscopy of hot atomic vapours is a hot topic. Many of the work-horse techniques of contemporary atomic physics were first demonstrated in hot vapours. Alkali-metal atomic vapours are ideal media for quantum-optics experiments as they combine: a large resonant optical depth; long coherence times; and well-understood atom-atom interactions. These features aid with the simplicity of both the experimental set up and the theoretical framework. The topic attracts much attention as these systems are ideal for studying both fundamental physics and has numerous applications, especially in sensing electromagnetic fields and quantum technology. This tutorial reviews the necessary theory to understand the Doppler broadened absorption spectroscopy of alkali-metal atoms, and explains the data taking and processing necessary to compare theory and experiment. The aim is to provide a gentle introduction to novice scientists starting their studies of the spectroscopy of thermal vapours whilst also calling attention to the application of these ideas in the contemporary literature. In addition, the work of expert practitioners in the field is highlighted, explaining the relevance of three extensively-used software packages that complement the presentation herein.

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Section: Narrowband Atomic Line Filtersmentioning

confidence: 99%

Laser spectroscopy of hot atomic vapours: from ’scope to theoretical fit

et al. 2022

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“…4 a). We can achieve any value of field between the maximum and 1.80 (8) kG; examples are shown in Fig. 5 b) and c).…”

Section: Resultsmentioning

confidence: 99%

“…MOFs find a wide range of applications in other disciplines including e.g. quantum key distribution [4]; optical isolators [5]; atmospheric LI-DAR [6,7]; and laser frequency stabilization [8,9]. In certain cases there is the need to produce large, uniform magnetic fields (i.e.…”

Section: Introductionmentioning

confidence: 99%

Tuneable homogeneous kG magnetic field production using permanent magnets

Pizzey

2021

Preprint

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We present a permanent magnet arrangement that can achieve a tuneable axial magnetic field from 1.80(8) -2.67(2) kG along the z-axis, where (x,y) = (0,0), with a rms field variation of less than 1% over a length of 25 mm. The instrument consists of an arrangement of off-the-shelf N42 neodymium-iron-boron (NdFeB) axially magnetized ring magnets, of varying outer and inner diameters. The magnets are organized into four cylindrical brass holders, whose relative separation can be manipulated to achieve the desired magnetic field strength and homogeneity over the region of interest. We present magnetic field computations and Marquardt-Levenberg fits to experimental data and demonstrate excellent agreement between theory and experiment. The apparatus has been designed to accommodate a cylindrical atomic vapor cell of length 25 mm and diameter 25 mm to lie within the bore of the ring magnets. The design has a clear aperture of 20 mm in the x-y plane along the z-axis, which opens up new avenues for imaging exploration in atomic spectroscopy.

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“…The Faraday laser [17]- [19], which is composed of an antireflection-coated laser diode (ARLD) as gain medium, a FADOF as frequency-selection element, and a high-reflectivity mirror for optical feedback, can stably operate at atomic Doppler broadened line with frequency being immune to the current and temperature fluctuation of laser diode (LD). It has been confirmed that the wavelength fluctuation of Faraday laser can achieve no more than ±2 pm within 48 hours [20]. Compared with the typical external-cavity diode lasers (ECDLs) utilizing interference filters (IFs) [21], [22], gratings [23], [24], or Fabry-P érot etalons [25], [26] as mode-selection elements, the Faraday lasers take advantage of the narrow-bandwidth atomic filter for frequency selection with frequency being set by the peak transmission frequency of FADOF.…”

Section: Introductionmentioning

confidence: 83%

“…Previous researches on Faraday lasers exclusively focused on the single-frequency operation [16], [18], [20]. However, the dual-frequency (DF) laser is of great importance in the fields like frequency stabilization and high-resolution spectroscopy.…”

Section: Introductionmentioning

confidence: 99%

A Dual-Frequency Faraday Laser

et al. 2020

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The Faraday laser, with Faraday anomalous dispersion optical filter (FADOF) as frequency-selection element, is a natural narrow-bandwidth light source for laser physic experiments. In this work, a dual-frequency (DF) Faraday laser is demonstrated for the first time on Cs D2 line at 852 nm. The frequencies of the two modes of DF Faraday laser hinge on the peak transition frequencies of 852 nm FADOF transmittance spectrum corresponding to the ground state F = 4 and F = 3. The frequency difference between the two modes is tunable over a range of 1.4 GHz with the temperature of Cs vapor cell inside the FADOF. The linewidth of each laser mode is less than 33 kHz. Furthermore, the most probable linewidth of the beat-note spectra between the two modes is 902.95 Hz at different vapor-cell temperatures. Such a DF Faraday laser has many potential applications in atomic physics, such as sub-Doppler spectroscopy and coherent population trapping atomic clocks.

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A Faraday laser operating on Cs 852 nm transition

Cited by 31 publications

References 59 publications

Laser spectroscopy of hot atomic vapours: from ’scope to theoretical fit

Laser spectroscopy of hot atomic vapours: from ’scope to theoretical fit

Tuneable homogeneous kG magnetic field production using permanent magnets

A Dual-Frequency Faraday Laser

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